Some kind of creeping mint would be your best bet. They're tough and smell good. Just be careful they stop at the fence - say, by digging in a root barrier - or your neighbours trying to cultivate a lawn might become irate.
https://lawncaregrandpa.com/a-...
Another possibility is crown vetch - very attractive, very invasive.
https://www.americanmeadows.co...
Vinca is nice and likes shade, but it needs a head start.
https://www.gardeningknowhow.c...
